Three-Dimensional Microstructural Modeling and Homogenization of Porous Alumina with Needle-Like Pores.

TAKANO Naoki, KIMURA Keiichi, ZAKO Masaru, KUBO Futoshi

doi:10.1299/kikaia.68.1163

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針状気孔を有するアルミナ多孔体の三次元ミクロ構造モデリングと均質化
シンジョウキコウオユウスルアルミナタコウタイノ 3ジゲンミクロコウゾウモデリングトキンシツカ

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In the development of functional ceramics, the study on the relation between the macroscopic properties and the microstructures has been a critical issue. However, it has not been made clear by many experimental works. On the other hand, this paper takes the computational mechanics approach using the homogenization method. To model the very complex microstructure architecture three-dimensionally, the image-based modeling technique is employed. A porous alumina with needle-like random pores with 3.1% porosity ratio is studied in this paper. The effect of the location of extracting the unit cell and its size on the homogenized elastic constants is investigated. Then, the predicted values were compared with the measured ones. As a result, a unit cell region expressed by one million voxel elements with 2μm resolution provides very accurate prediction regardless of the location of the unit cell in the random microstructures. The error between the numerical prediction and the measurement is only 1%.

Journal

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 68 (672), 1163-1169, 2002

The Japan Society of Mechanical Engineers

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